Sister thought she gave me a boner?

So she was all excited this morning, ready to go out with her b/f. She swiftly entered my room streaming and shouting banter
I was still in bed dreaming, not sure is it was real life as I woke up to my sister bouncing up and down directly above my penis (under the covers)
Now I'm not sure if it was morning glory or she caused it, I'm ashamed to say I didn't stop her until 3 second later :/

So she was all excited this morning, ready to go out with her b/f. She swiftly entered my room streaming and shouting banter
I was still in bed dreaming, not sure is it was real life as I woke up to my sister bouncing up and down directly above my penis (under the covers)
Now I'm not sure if it was morning glory or she caused it, I'm ashamed to say I didn't stop her until I jizzed :/